EN JA
CONNECTAT(2)
CONNECTAT(2) FreeBSD System Calls Manual CONNECTAT(2)

NAME

connectatinitiate a connection on a socket

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include < sys/types.h>
#include < sys/socket.h>


#include < fcntl.h>

int
connectat( int fd, int s, const struct sockaddr *name, socklen_t namelen);

DESCRIPTION

The connectat() system call initiates a connection on a socket. It works just like the connect(2) system call with two exceptions:

  1. It is limited to sockets in the PF_LOCAL domain.

  2. If the file path stored in the sun_path field of the sockaddr_un structure is a relative path, it is located relative to the directory associated with the file descriptor fd. If connectat() is passed the special value AT_FDCWD in the fd parameter, the current working directory is used and the behavior is identical to a call to connect(2).

RETURN VALUES

The connectat() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

ERRORS

The connectat() system call may fail with the same errors as the connect(2) system call for a UNIX domain socket or with the following errors:
[ EBADF]
The sun_path field does not specify an absolute path and the fd argument is neither AT_FDCWD nor a valid file descriptor.
[ ENOTDIR]
The sun_path field is not an absolute path and fd is neither AT_FDCWD nor a file descriptor associated with a directory.

AUTHORS

The connectat was developed by Pawel Jakub Dawidek <pawel@dawidek.net> under sponsorship from the FreeBSD Foundation.
February 13, 2013 FreeBSD